Nickel-Iron Wire Inspection
Nickel-Iron wire inspection is conducted prior to reed pressing as it is the primary and most important material of a reed switch. The surface of the wire plays a large role on the outcome of the pressed blade which in turn influences how well the sputter coating will deposit on the contact area.
For high quality Reed Switch production, the Nickel-Iron alloy wire used and the glass tube used should have similar coefficient of thermal expansion. This ensure hermetic seals which are matched well during the melt cycle.
Wire Inspection is conducted for straightness, surface pits, marks or scratches, diameter uniformity, and other physical characteristics such as hardness, smoothness and tensile strength.